The P02A4: Cylinder 3 – Injector Restricted code indicates that the fuel injector for cylinder 3 is not delivering the proper amount of fuel due to a restriction. This may be caused by a clogged or faulty fuel injector, contaminated fuel, or low fuel pressure. This issue can lead to poor engine performance, misfires, and reduced fuel efficiency if not addressed promptly.
P02A4 – Quick Overview
| Meaning | P02A4: Cylinder 3 – Injector Restricted |
| Is it serious? | Yes, this code can cause poor engine performance and should be addressed to prevent further damage. |
| Possible causes | – Clogged or faulty fuel injector – Contaminated fuel – Low fuel pressure |
| How to diagnose? | – Clean or replace the fuel injector for cylinder 3 – Check for fuel contamination – Verify fuel pressure is within specifications |
P02A4 Meaning
The P02A4: Cylinder 3 – Injector Restricted code means that the fuel injector for cylinder 3 is not delivering the required amount of fuel due to a restriction. This could be caused by a clogged injector, contaminated fuel, or low fuel pressure. If left unresolved, this problem can result in poor engine performance, rough idling, and misfires.
Step-by-step diagnostic guide
Here’s how you can troubleshoot and resolve the P02A4 code:
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any related codes that might give further clues about the fuel system or injector issues. | OBD-II Scanner |
| Inspect the Fuel Injector | Remove and inspect the fuel injector for cylinder 3. Clean the injector if clogged, or replace it if necessary. | Fuel Injector Cleaner, Multimeter |
| Check for Fuel Contamination | Inspect the fuel for contamination such as dirt, water, or debris. Replace the fuel if contamination is found. | Fuel Testing Kit, Fuel Drain Tools |
| Verify Fuel Pressure | Test the fuel pressure to ensure it is within the manufacturer’s specifications. Low fuel pressure can cause injector restrictions. | Fuel Pressure Gauge |
| Inspect Fuel Pump and Filter | Check the fuel pump and fuel filter for blockages or malfunctions. Replace any faulty components as necessary. | Fuel Pressure Gauge, Replacement Filter |
| Repair/Replace Components | Replace any faulty or contaminated components to ensure proper fuel flow to cylinder 3. | Replacement Parts, Basic Tools |
| Clear Code and Test Drive | After repairs, clear the P02A4 code using an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle after the test drive to ensure the P02A4 code does not return. | OBD-II Scanner |
By following this guide, you can properly diagnose and repair the P02A4 code, ensuring that the fuel injector for cylinder 3 is functioning correctly and restoring your vehicle’s performance.
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko